Hi, so I am just posting this here because i searched and searched the internet looking for info regarding incubators and whether they are efficient to use with off grid power but did not find any. I hope that someone who has the same concerns that I did will find this post helpful The Hovabator 1602n that I purchased was a great choice for my solar powered home. I also have a fan installed and it has not drawn our batteries down as I expected. As far as "appliances" and electronics go, I feel comfortable saying that this incubator seems to use less than just about everything else. It has been cold here as well, we only heat with a wood stove and the incubator temp has been a steady 99-100, a few moments of 101 here and there, easy to adjust. I am just thrilled. A few nights ago, I didn't wake up to feed the fire and it was 57 inside the next morning, the incubator stayed at 100. Hope this helps someone, happy hatching!